hello,

I have a problem with my wideband conversion on my cupra 1.8t 20vt ayp, i did this wiring :

Pin#1 goes to Pin#3
Pin#2 goes to Pin#4
Pin#3 goes to Pin#5
Pin#4 goes to Pin#1
Pin 52 on ecu goes to wideband o2 sensor Pin#6
Pin 71 on ecu goes to wideband 02 sensor Pin#2

 i had to add power 12v to pin 121 because the harness on my car don't have it (i will add relay to control this later actually is on the 100 relay with a fuse) and unplug one pin for fan control because it was on the input for egt.

I measured my resistance from my harness and everything seems good <1ohm but i have this fault code:

 "16519 oxygen lambda B1 S1 heating circuit
   p0135 35 00 malfunction"
 
I tried another lambda that I have in stock (which i know is working) and another ecu but same thing..

my stock ecu : 6k0 906 032 aa 

my new ecu : 06a 906 032 qk ( i flash it with 06a 906 32 hs for better bin def)

 
i don't know where to go .. can it be other fault that causing my problem ?


thank you in advance for the help you would give me and the help you have already given me thanks to this forum 



 

thank for the reply,


i think this ecu came from seat alhambra 1.8t 20v with the awc engine.

Yes, no problem.